MESON Chess Problem Database

Problem Display
PID: 224724 (8/2K5/6Q1/3pNR2/2n1k3/4p3/1P2q3/8 w - - 0 1)

Wash, Benjamin S

St. Louis Globe Democrat, 1887

8/2K5/6Q1/3pNR2/2n1k3/4p3/1P2q3/8

#2

5 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qg4#
    • 1...Qg4
      • 2.Qxg4#
    • 1...Qe1
      • 2.Qg4#
    • 1...Qxb2
      • 2.Qg4#
    • 1...Qc2
      • 2.Qg4#
    • 1...Qd2
      • 2.Qg4#
  • Tries
    • 1.Rf4+?
      • 1...Kxe5
        • 2.Qf5#
        • 2.Qf6#
      • 1...Kxf4!
    • 1.Rg5+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Rf4#
      • 1...Kxd3
        • 2.Rxd5#
      • 1...Kd4
        • 2.Rf4#
      • 1...Qxd3
        • 2.Qg4#
      • 1...d4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::QAR2(D)
    • Q(a);N_GUARD::QAR2(D),XQ(a)
    • Q(a);N_GUARD,XP(A)::QAR2(D)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(d);P-FLIGHT,XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(D)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAB(D)+R(C),DCHECK
    • Vars
      • K(d);S_FLIGHT,XS(B)::QAB(D)+R(C),DCHECK,XP(e)
      • K(d);P-FLIGHT::R(C)
      • Q(a);N_GUARD,SBLOCK,XS(B)::QAR2(D)
      • P(e);SBLOCK::S(B)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).